---
title: "Windows Event For Service Disabled"
excerpt: "Disable or Modify Tools
, Impair Defenses
"
categories:
  - Endpoint
last_modified_at: 2022-04-04
toc: true
toc_label: ""
tags:
  - Disable or Modify Tools
  - Impair Defenses
  - Defense Evasion
  - Defense Evasion
  - Splunk Enterprise
  - Splunk Enterprise Security
  - Splunk Cloud
  - Endpoint
---



[Try in Splunk Security Cloud](https://www.splunk.com/en_us/products/cyber-security.html){: .btn .btn--success}

#### Description

This analytic will identify suspicious system event of services that was modified from start to disabled. This technique is seen where the adversary attempts to disable security app services, other malware services to evade the defense systems on the compromised host

- **Type**: [Hunting](https://github.com/splunk/security_content/wiki/Detection-Analytic-Types)
- **Product**: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
- **Datamodel**: [Endpoint](https://docs.splunk.com/Documentation/CIM/latest/User/Endpoint)
- **Last Updated**: 2022-04-04
- **Author**: Teoderick Contreras, Splunk
- **ID**: 9c2620a8-94a1-11ec-b40c-acde48001122


#### Annotations

<details>
  <summary>ATT&CK</summary>

<div markdown="1">


| ID             | Technique        |  Tactic             |
| -------------- | ---------------- |-------------------- |
| [T1562.001](https://attack.mitre.org/techniques/T1562/001/) | Disable or Modify Tools | Defense Evasion |

| [T1562](https://attack.mitre.org/techniques/T1562/) | Impair Defenses | Defense Evasion |

</div>
</details>


<details>
  <summary>Kill Chain Phase</summary>

<div markdown="1">

* Exploitation


</div>
</details>


<details>
  <summary>NIST</summary>

<div markdown="1">

* DE.CM



</div>
</details>

<details>
  <summary>CIS20</summary>

<div markdown="1">

* CIS 3
* CIS 5
* CIS 16



</div>
</details>

<details>
  <summary>CVE</summary>

<div markdown="1">


</div>
</details>

#### Search 

```
`wineventlog_system` EventCode=7040  Message = "*service was changed from demand start to disabled." 
| stats count min(_time) as firstTime max(_time) as lastTime by ComputerName EventCode Message User Sid service service_name 
| `security_content_ctime(firstTime)` 
| `security_content_ctime(lastTime)` 
| `windows_event_for_service_disabled_filter`
```

#### Macros
The SPL above uses the following Macros:
* [security_content_ctime](https://github.com/splunk/security_content/blob/develop/macros/security_content_ctime.yml)
* [wineventlog_system](https://github.com/splunk/security_content/blob/develop/macros/wineventlog_system.yml)

> :information_source:
> **windows_event_for_service_disabled_filter** is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

#### Required field
* _time
* ComputerName
* EventCode
* Message
* User
* Sid


#### How To Implement
To successfully implement this search, you need to be ingesting logs with the Service name, Service File Name Service Start type, and Service Type from your endpoints.

#### Known False Positives
Windows service update may cause this event. In that scenario, filtering is needed.

#### Associated Analytic story
* [Windows Defense Evasion Tactics](/stories/windows_defense_evasion_tactics)




#### RBA

| Risk Score  | Impact      | Confidence   | Message      |
| ----------- | ----------- |--------------|--------------|
| 36.0 | 60 | 60 | Service was disabled on $Computer$ |


> :information_source:
> The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author. 

#### Reference

* [https://blog.talosintelligence.com/2018/02/olympic-destroyer.html](https://blog.talosintelligence.com/2018/02/olympic-destroyer.html)



#### Test Dataset
Replay any dataset to Splunk Enterprise by using our [replay.py](https://github.com/splunk/attack_data#using-replaypy) tool or the [UI](https://github.com/splunk/attack_data#using-ui).
Alternatively you can replay a dataset into a [Splunk Attack Range](https://github.com/splunk/attack_range#replay-dumps-into-attack-range-splunk-server)


* [https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/olympic_destroyer/system.log](https://media.githubusercontent.com/media/splunk/attack_data/master/datasets/malware/olympic_destroyer/system.log)



[*source*](https://github.com/splunk/security_content/tree/develop/detections/endpoint/windows_event_for_service_disabled.yml) \| *version*: **2**